Under light throttle and cruise everything is normal. at WOT the truck pulls hard and sounds great.

When I am cruising and start rolling into the throttle (to pass a car) the engine sounds like it kind of stumbles or misfires for about a second and then clears up and starts pulling nicely. I fugured It was just my HPOP not keeping up, but I just put a T500 in and does the same thing.

truck has 164,000 miles on it.definetly feels like a lack of power when jumping on the throttle or rolling into it. once you get it steady or wot...it pulls just fine..... any ideas???

I figured it might be my custom tunes since theyre for water meth, but my canned TS position 6 does the same thing. I have the FPR shim in, so Im assuming fuel pressure is good. and the factory lift pumps should support stg 1's

I will try that when I leave work today. I was thinking the same thing.

oil has about 5000 miles on it just sent that in for analysis as well 5-40 rotella T6 synthetic. When I pulled the oil from the resivoir I noticed alot of tiny bubbles. I dont think its enough to be considered a foaming issue tho.

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